文献类型：期刊文献

英文题名：Dietary supplementation of bile acid attenuate adverse effects of high-fat diet on growth performance, antioxidant ability, lipid accumulation and intestinal health in juvenile largemouth bass (Micropterus salmoides)

作者：Yin P.; Xie S.; Zhuang Z.; He X.; Tang X.; Tian L.; Liu Y.; Niu J.

机构：[1]Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals, Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China;[2]Laboratory of Aquatic Animal Nutrition and Feed, Fisheries College, Guangdong Ocean University, Zhanjiang, China;[3]Institute of Marine Research (IMR), Bergen, Norway

年份：2021

卷号：531

外文期刊名：Aquaculture

收录：Scopus(收录号：2-s2.0-85090744373)

语种：英文

外文关键词：Antioxidant capacity; Bile acid; Growth performance; Intestinal health; Largemouth bass

外文摘要：Bile acid (BA) has been reported to improve growth performance and play an important role in lipid metabolism of fish. Five diets were formulated to investigate the effects of dietary bile acid (chenodeoxycholic acid) supplementation on growth performance, antioxidant capacity, lipid metabolism and intestinal health of juvenile largemouth bass (Micropterus salmoides). Fish (18.35 ± 0.05 g) were randomly fed five diets: the positive control diet (10.87% lipid, C), high fat diet (18.08% lipid, HF), and HF diets supplemented with 300, 600 and 900 mg/kg chenodeoxycholic acid (HFC1, HFC2 and HFC3, respectively). After 9 weeks of feeding experiment, the weight gain (WG) and special growth rate (SGR) were significantly lower in the fish fed diet HF compared with those fed diet C (P < 0.05). Compared with the group C, there were no significant differences in WG and SGR of fish fed high fat diet with 900 mg/kg chenodeoxycholic acid (P > 0.05). Viscerosomatic index (VSI) and intraperitoneal fat ratio (IPF) were significantly higher in fish fed high fat diets than those fed the control diet (P < 0.05). The crude lipid and protein contents in muscle showed no significant differences among fish fed diets with high dietary lipid (P > 0.05), while the crude lipid of muscle significantly decreased in HFC2 group (P < 0.05). Triglyceride (TG), malondialdehyde (MDA) in plasma and MDA in liver were higher in HF group than control group, addition of BA could decrease those contents effectively and increase the gene expression of SOD and GSH-Px. Lipidprotein transport and cholesterol synthesis related mRNA levels were significantly increased in fish fed high fat diets containing BA. The supplementation of 900 mg/kg BA significantly increased the gene expression of apolipoprotein B (ApoB-100), sterol 26-hydroxylase (CYP27α) and liver X receptor (LXR) (P < 0.05). High-fat diet significantly increased the pro-apoptotic gene expression, while anti-apoptotic gene B-cell lymphoma-2 (Bcl-2) and B-cell lymphoma-xl (Bcl-xl) mRNA levels were significantly increased with the increasing dietary BA (P < 0.05). In addition, supplemental BA in high-fat diet increased the height of intestinal fold and decreased lipid accumulation in liver. These results suggested that dietary BA supplementation could improve the digestion and absorption of lipids, antioxidant capacity and intestinal health, thereby attenuating the adverse effect induced by high fat diet of largemouth bass. ? 2020 Elsevier B.V.